* update empty features check (#6985)

* rtsp push stream in pipeline (#7000)

* add push stream

* update push stream docs

* update class name

* update PP-Vehicle docs and en docs (#7042)

* update PP-Vehicle docs and en docs

* add reid model in v2.5 modelzoo

* update more

* multi_thread & multi_rtsp input (#6834)

* multi_thread & multi_rtsp input; test=document_fix

* update rtsp docs; test=document_fix

* update savename,add threadid to name;test=document_fix

* update pphuman&ppvehicle configs relative path

* 1. add md5sum check;
2. add illegal parking recognition.

* add config for illegal parking recognition

* car licenseplate skipframe&time counter vote (#6609)

* car licenseplate skipframe&time counter vote

* incase of no track

* update the method to get plate

* if illegal_parking_time is -1, do not update_object_info

* get model dir from cfg

* illegal parking visualize optimize
Co-authored-by: Nzhiboniu <31800336+zhiboniu@users.noreply.github.com>

* 1. add -o command for pipeline;
2. remove basemode config;
3. add example configs for pphuman.

* copyright to Copyright

* 1. update docs for quick start;
2. delete merge_model_dir;
3. move cfg codes to cfg_utils.py

* Update QUICK_STARTED.md

* Update PPVehicle_QUICK_STARTED.md

* Update pphuman_action.md

* Update pphuman_action_en.md

* Update pphuman_attribute.md

* Update pphuman_attribute_en.md

* Update cfg_utils.py